简介：Theinfluenceofthevolumefractionoftemperedmartensiteonmagnetomechanicaldampingoftheferriticmatrixindual-phasealloyswasstudied.Theexperimentalresultsshowedthat（1）dual-phasedampingalloyisofgoodcombinationofstrengthandtoughness:（2）gooddampingca-pacity(Q-1≥5.0×10-3)canbeobtainedindual-phasealloysonlywhenthevolumefractionoftemperedmartensitewascontrolledproperly.Theeffectofmartensiteonmagnetomechanicaldamp-ingoftheferriticmatrixwasanalysed.Thedampingcapacityofdual-phasealloyswasrelatedtothevolumefractionVmoftemperedmartensitebyQ^{-1=Q-1（1-Vm/1+BVm）atsmallvibrationstrainamplitudesεA≤5.0×10-6.}

简介：由使用焊接电线的镍，焊接弧的以铁酸盐为主要成的可锻的铁的部分熔化地区(PFZ)和焊接金属的机械性质的寒心的趋势上的alloying的效果系统地被学习了。在这个基础上，为以铁酸盐为主要成的可锻的铁(QT400-17)的弧焊的一个新镍电极第一次被开发。它的焊接金属的机械性质能以铁酸盐为主要成的可锻的铁匹配那些。在PFZ的碳化物层(WCL)的宽度显著地被减少，焊接关节有优秀马赫无能，焊接金属有高热的抗碎裂性。(编辑作者摘要)3个裁判员。

简介：在团结微观结构的谷物结构和precipitates极端纯有不同Ti或Nbmicro-alloying的17wt%Cr以铁酸盐为主要成的不锈钢试验性地并且理论上被调查。到钢的Ti或Nb的增加减少了谷物尺寸(D)和延伸因素(E)，这被谷物结构观察发现，并且改进了equiaxed谷物比例(P)和球状因素()。在学习的四钢之中，最小的谷物尺寸和最大的equiaxed谷物比例被联合把Ti和Nb加到钢获得。SEM观察显示了那几种猛冲例如锡，MC(在Nb的富人)，等等，洗阶段(Fe2Nb)在相应的钢形成了。另外，用Thermo计算软件计算的结果说明了那听在合适的Ti和N内容在液体猛抛。同时，团结间隔(T)被Ti或Nb的增加扩大，并且Nb的有效性比Ti强壮。基于试验性并且计算结果，在equiaxed谷物比例的谷物精炼和增长的机制被讨论。

简介：Thepresentstudyisconcernedwiththeeffectoffillermetalssuchasausteniticstainlesssteel,ferriticstainlesssteelandduplexstainlesssteelontensileandimpactpropertiesoftheferriticstainlesssteelconformingtoAISI409Mgrade.Rolledplatesof4mmthicknesswereusedasthebasematerialforpreparingsinglepassbuttweldedjoints.Tensileandimpactproperties,microhardness,microstructureandfracturesurfacemorphologyofthejointsfabricatedbyausteniticstainlesssteel,ferriticstainlesssteelandduplexstainlesssteelfillermetalswereevaluatedandtheresultswerereported.Fromthisinvestigation,itisfoundthatthejointsfabricatedbyduplexstainlesssteelfillermetalshowedhighertensilestrengthandhardnesscomparedtothejointsfabricatedbyausteniticandferriticstainlesssteelfillermetals.Jointsfabricatedbyausteniticstainlesssteelfillermetalexhibitedhigherductilityandimpacttoughnesscomparedwiththejointsfabricatedbyferriticstainlesssteelandduplexstainlesssteelfillermetals.

简介：Themartensitic/ferriticsteelshavebeenusedasboilerandturbinematerialsinpowerplants,andalsobeenselectedaspotentialmaterialsforstructuralmaterialsinnuclearreactors.Inthispaper,thekineticanalysisofthemartensiteformationandmicrostructuralcontrolofhigh-Crmartensitic/ferriticsteelsarereviewed.Amodularapproach,incorporatingFisherpartitioningnucleationandanisotropicgrowthforimpingement,wasproposedtodescribethemartensiteformationkineticsunderdifferentcoolingrates.Thekineticanalysissuggestedathermal-activatedgrowthfeatureoccurringduringthemartensitictransformationofmartensiticsteels.Themicrostructurecanbetunedbycompositionoptimizationandvariouscombinationsofheattreatmentparameters(temperature,time,severeandminordeformation).Fortheapplicationinpowerplant,thepotentialofboundary-design,refinementoforiginalaustenitegrainsizeandthefinalmartensiticlath,pinningeffectofstablecarbides,inimprovingtheperformancesofmartensitic/ferriticsteelsatelevatedtemperaturesshouldbeinvestigatedmorethoroughly.Furthermore,effortsshouldbemadetoexploretheeffectsofretainedausteniteontheimprovementofhigh-temperaturecreepstrength.Fortheapplicationofnuclearplants,attemptsshouldalsobemadetoproduceFepowderswithuniformlydistributedoxideparticlesbychemicalreactions.